Perdas qualitativas na colheita mecanizada de sementes de soja

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Data

2013-03-01

Autores

Da Silva, Rouverson Pereira [UNESP]
Da Silva, Breno Marques [UNESP]
Barrozo, Leandra Matos
Salum, Juliane Dossi [UNESP]
Rosa, Mariana Silva [UNESP]
Gomes, Delineide Pereira

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Resumo

The study aimed to assess the physical and physiological characteristics of soybean seeds collected in grain tank and the outlet of the discharge tube of the harvester, depending on the year and the forward speed of the harvester. The experimental design was completely randomized in a factorial 2 x 2 x 2 tested two harvesters of different years, two displacement's speeds and two locations of sample collection, totaling eight treatments with four replications. The harvest of soybean cv. COODETEC 217, was performed with two tangential harvesters, aged three and four years, with 900 rpm rotation of the cylinder, operating at forward speeds of 4 ± 0.5 km h-1 and 7 ± 0.5 km h-1. Seed samples (approximately 3 kg) were withdrawn at the grain tank and the outlet of the discharge tube of the harvester and subjected to determinations of water content in field and laboratory. Subsequently, we evaluated purity, mechanical damage, germination and seed vigor. The younger harvester had a higher percentage of pure seed and lowest percentage of inert material. The increase in forward speed provides the higher the bands percentage and reduction of percentages of pure seed and inert material. The percentage of inert material was higher for seeds collected in the discharge pipe. The speed increase has positively influenced the emergence in sand for the harvester oldest (4 years) and negatively to the harvester youngest (3 years). At lower speeds the youngest harvester higher percentage of germination in sand.

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Palavras-chave

Glycine max (L.) Merrill, Mechanical damage, Physical purity, Physiological quality

Como citar

Semina:Ciencias Agrarias, v. 34, n. 2, p. 477-484, 2013.